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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 */

/*
 * @test
 * @bug 8288483
 * @summary Test that JAVA_TOOL_OPTIONS variable are hanled corectly ever if they exceed 1024 bytes
 * @library /testlibrary
 * @run driver EnvVarOptionsTest
 */

import java.io.PrintWriter;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryPoolMXBean;
import java.util.NoSuchElementException;

import com.oracle.java.testlibrary.ProcessTools;
import com.oracle.java.testlibrary.OutputAnalyzer;

public class EnvVarOptionsTest {

    /* Put more than 64 options to command line */
    public static String CreateOptionsString(int items) {
        StringBuilder vm_flags = new StringBuilder();
        for (int i = 0; i < items; ++i) {
           vm_flags.append(" -XX:+BO" + i);
        }
        return vm_flags.toString();
    }

    public static void runJavaWithOptions(String flags) throws Exception {
        ProcessBuilder pb = null;
        OutputAnalyzer output = null;

        String[] envVars = {
            "_JAVA_OPTIONS",
            "JAVA_TOOL_OPTIONS"
        };

        for (String envVar :  envVars) {
            System.out.println("Test " + envVar + " env-var");
            pb = ProcessTools.createJavaProcessBuilder("-XX:+PrintVMOptions",
                                                       "-XX:+IgnoreUnrecognizedVMOptions", "-version");
            pb.environment().put(envVar, flags);
            output = new OutputAnalyzer(pb.start());
            output.shouldContain("VM option '+BO66'");
            output.shouldHaveExitValue(0);
            output.reportDiagnosticSummary();
        }
    }

    public static void main(String... args) throws Exception {
        // JVM will report
        // [Picked up _JAVA_OPTIONS:  -XX:+BO0 ... -XX:+BO66]
        // But only first 64 options are actually picked because of
        // the hardcoded HotSpot limit
        String flags = CreateOptionsString(67);
        runJavaWithOptions(flags);

        // JVM will ignore the variable
        // with no clue of what is happening
        flags = CreateOptionsString(1024);
        runJavaWithOptions(flags);
    }
}